Improvement in insect-traps



Jouw JAMES ARMSTRQNG.

impfrovement. En lns'ect Traps.

Patented Oct. 17, i871.

[iwf/Zar y n 5 y //MW UNITED STATES PATENT GEEICE.

JOHN JAMES ARMSTRONG, OF KINGS COUNTY, NFV YORK.

IMPROVEMENT IN INSECT-TRAPS.

Specification forming part of Letters Patent No. 120,020, dated October17,1871.

To all whom it may concern:

Be it known that I, J oHN J AiviEs ARMSTRONG, of the coimty of Kings andState of New York, have invented a certa-in Improvement in Insect-Traps, of which the following is a specification:

My invention relates'to insect-traps in general, but is moreparticularly designed for catching that class of insects known asroaches; it conA sists in the peculiar construction of a cup, and in thecombination of the same with any ordinary receiver, in which the saidcup is placed, as will be hereinafter described.

In the accompanying drawing, Figure 1 represents a vertical section ofatrap complete, embodying my invention. Fig'. `2 is a top view ot' thecup. Fig'. 3 is a horizontal section of the same taken through the linem :r of Fig. 1.

Similar letters of reference indicate like parts.

A is the ordinary receiver of a trap, semi-spherical, or of any othershape, and made of wirecloth or any other suitable material. It isprovided with an opening, in which is inserted the cup above mentioned.This cup B tits tight in the opening in A, and is prevented fromslipping through the same by means of a flange at its upper edge, or bymeans of its upper end iiaring outward wider than the said opening. Thecup B may be made of any material having a smooth or glossy surface, andits circumference or perimeter may be of any form, round, oval,prismatic, or polygonal, so long as it has the following peculiaritiesThe upper end C and the lower end or bottom D are wider than the middlepart E, so that a vertical section of each side of the cup B willpresent a concavo-convex form, the convexity being inward; or the sidesofthe cup B may be said to be constructed of two hollow truncated cones,joined together at their smaller ends. A little distance from the bottomD the cup B is provided with orifices F. The cup B should not be higheror deeper than when inserted in. position, the under side of its bottoniwill stand far enough above the bottoni or the receiver to allow aroach, when in the receiver', to pass freely underneath the said cup Thecup is filled to a little below or flush with the lower edge of theapertures F with a liquid bait G. The roach, taking advantage oftheineline downward ofthe sides ofthe cup B for foothold in descending toreach the bait, and seeing the bottom D below, land apertures F ofescape, steps down and through the latter into the receiver A, fromwhence escape is impossible. Should it happen to reach again one oftheopenings F, the convexity oi' the glossy inner surface of the cupnarrowing from the bottom toward the center of its height, aords nofoothold i'or climbing but the roach tuinbles into the liquid and isdrowned or gets through the apertures F again to the receiver A.

I claim- The cup B, of concavo-convex sides, and provided Wth theapertures F and bottom D, in combination with the receiver A,substantially as and tor the purpose speciiied.

The above specication of my invention signed by me this 1st day ofSeptember, 18171.

JOHN JAMES ARMSTRONG.

